the Route 2 commuter bus runs from Montpelier to St Johnsbury, which isn't Craftsbury but the first bit is just a little closer. It does get you closer to Burke, which is another option for Northeast Kingdom xc trails.

Sterling College is in Craftsbury, so there may be students driving in/out around school breaks. Not sure of any ride boards. /r/icecoast is pretty active. not VT specific (and not much xc talk?), but I think a lot of people coming up from NY/MA use it to talk and sometimes organize trips.